TECHNICAL FIELD
[0001] The present disclosure generally relates to the field of electronic technologies,
and in particular, to a method for collecting a fingerprint and related products.
BACKGROUND
[0002] Nowadays, the fingerprint function has become a standard for terminal devices (such
as smart phones), and even terminal devices without fingerprint function cannot keep
up with the times. A fingerprint sensor (also known as fingerprint Sensor) is a key
device for automatically collecting a fingerprint. According to the sensing principle,
the fingerprint sensor is divided into an optical fingerprint sensor, a semiconductor
capacitor sensor, an ultrasonic sensor, and the like.
[0003] Fingerprint recognition plays a crucial role in functions such as fingerprint unlocking
and fingerprint payment. However, the quality of the fingerprint collected by the
fingerprint sensor determines the success rate of fingerprint recognition. Therefore,
how to improve the quality of the collected fingerprint is a technology problem that
needs to be solved.
SUMMARY OF THE DISCLOSURE
[0004] Embodiments of the present disclosure provide a method for collecting a fingerprint
and related products, which are used to improve the quality of collected fingerprints.
[0005] In a first aspect, an embodiment of the present disclosure provides a terminal device,
which includes an optical fingerprint sensor and a touch display screen. The touch
display screen includes a preset region, and the optical fingerprint sensor is disposed
below the preset region, wherein brightness of light emitted from a light-emitting
unit in the preset region of the touch display screen is greater than brightness of
light emitted from other light-emitting unit in other region of the touch display
screen when the optical fingerprint sensor collects a fingerprint.
[0006] In a second aspect, an embodiment of the present disclosure provides a method for
collecting a fingerprint, applied to a terminal device including an application processor,
an optical fingerprint sensor, and a touch display screen, the touch display screen
including a preset region, wherein the optical fingerprint sensor is disposed below
the preset region, including:
controlling a light-emitting unit in the preset region of the touch display screen
to emit light, wherein brightness of the light emitted from the light-emitting unit
in the preset region of the touch display screen is greater than brightness of light
emitted from other light-emitting unit in other region of the touch display screen;
and
acquiring the fingerprint illuminated by the light emitted from the light-emitting
unit in the preset region of the touch display screen.
[0007] In a third aspect, an embodiment of the present disclosure provides an apparatus
for collecting a fingerprint, applied to a terminal device an optical fingerprint
sensor and a touch display screen, wherein the touch display screen includes a preset
region, and the optical fingerprint sensor is disposed below the preset region, and
the apparatus includes a processor.
[0008] The processor is configured for controlling a light-emitting unit in the preset region
of the touch display screen to emit light, wherein brightness of the light emitted
from the light-emitting unit in the preset region of the touch display screen is greater
than brightness of light emitted from other light-emitting unit in other region of
the touch display screen; and acquiring the fingerprint illuminated by the light emitted
from the light-emitting unit in the preset region of the touch display screen.
[0009] In a fourth aspect, an embodiment of the present disclosure provides a terminal device,
including an application processor (AP), an optical fingerprint sensor, a touch display
screen, a memory, and one or more programs, wherein the touch display screen includes
a preset region, the optical fingerprint sensor is disposed below the preset region.
[0010] The one or more programs are stored in the memory and configured to be executed by
the AP.
[0011] The one or more programs includes instructions for performing a method in in the
second aspect of the present disclosure.
[0012] In a fifth aspect, an embodiment of the present disclosure provides a computer readable
storage medium, storing a computer program for the electronic data interchange, wherein
the computer program causes a computer to perform a part or all of the steps of the
method in the second aspect of the present disclosure.
[0013] In a sixth aspect, an embodiment of the present disclosure provides a computer program
product, including a non-transitory computer readable storage medium storing a computer
program, the computer program being operative to cause a computer to perform a method
in the second aspect of the present disclosure.
[0014] It can be seen that, in the embodiments provided by the present disclosure, when
the fingerprint is collected, the brightness of the light that illuminates the fingerprint
of the user is increased, thereby improving the quality of the collected fingerprint.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to make the technical solution described in embodiments or background of
the present disclosure more clearly, the drawings used for the description of the
embodiments or background will be described.
FIG 1 is a schematic structural diagram of a terminal device according to embodiments
of the present disclosure.
FIG. 2 is a schematic view of an interface according to embodiments of the present
disclosure.
FIG. 3 is a schematic view of another interface according to embodiments of the present
disclosure.
FIG. 4 is a schematic view of another interface according to embodiments of the present
disclosure.
FIG. 5 is a schematic flowchart of a method for collecting a fingerprint according
to embodiments of the present disclosure.
FIG. 6 is a schematic structural diagram of another terminal device according to embodiments
of the present disclosure.
FIG. 7 is a schematic structural diagram of an apparatus for collecting a fingerprint
according to embodiments of the present disclosure.
FIG. 8 is a schematic structural diagram of another terminal device according to embodiments
of the present disclosure.
DETAILED DESCRIPTION
[0016] In order to better understand the present disclosure for those skilled in the art,
the technical solutions in the embodiments of the present disclosure are clearly and
completely described in conjunction with the drawings in the embodiments of the present
disclosure. It is obvious that the described embodiments are only a part of the embodiments
of the present disclosure, and not all embodiments. All other embodiments obtained
by the ordinary skilled in the art based on the embodiments in the present disclosure
without the creative work are all within the scope of the present disclosure.
[0017] The details are described in the following.
[0018] The terms "first", "second", "third", and "fourth" in the specification and claims
of the present disclosure and the above drawings are used to distinguish different
objects, and are not intended to describe a specific order. Furthermore, the terms
"including" and "having", and any modification thereof are intended to cover unexclusive
inclusion. For example, a process, method, system, product, or device that includes
a series of steps or units is not limited to the listed steps or units, but optionally
also includes steps or units not listed, or alternatively includes other steps or
units inherent to these processes, methods, products, or equipment.
[0019] "Embodiment" herein means that a particular feature, structure, or characteristic
described with reference to embodiments can be included in at least one embodiment
of the present disclosure. The term appearing in various places in the specification
are not necessarily referring to the same embodiment, and are not exclusive or alternative
embodiments that are mutually exclusive with other embodiments. Those skilled in the
art will understand explicitly and implicitly that the embodiments described herein
can be combined with other embodiments.
[0020] A terminal device, also known as a user equipment (UE), is a device for providing
voice and / data connectivity for a user, for example, a handheld device or in-vehicle
equipment having wireless connection capability. Common terminals, for example, includes
a mobile phone, a tablet PC, a laptop, a PDA, a mobile Internet devices (MID), a wearable
device such as a smart watcher, a smart bracelet, or a pedometer.
[0021] Embodiments of the present disclosure are described below in conjunction with the
accompanying drawings in embodiments of the present disclosure.
[0022] FIG. 1 is a schematic structural diagram of a terminal device 100 according to embodiments
of the present disclosure. The terminal device 100 includes an application processor
(AP) 110, an optical fingerprint sensor 130, and a touch display screen 120. The touch
display screen 120 includes a preset region. The optical fingerprint sensor 130 is
disposed below the preset region. When the optical fingerprint sensor 130 collects
a fingerprint, brightness of light emitted from a light-emitting unit in the preset
region of the touch display screen 120 is greater than brightness of light emitted
from other light-emitting unit in other region of the touch display screen 120.
[0023] In an example, the touch display screen 120 is one of an LCD display, an OLED display,
and an LED display.
[0024] In an example, the maximum size of the preset region is the entire touch display
screen, and the minimum size is an area that enables the user to input a fingerprint
with a sufficient area, which is not limited in the present disclosure.
[0025] In an example, the preset region may be disposed at a lower left corner of the touch
display screen 120, a lower right corner of the touch display screen 120, or an upper
right corner of the touch display screen 120, which is not limited in the present
disclosure.
[0026] In an example, the shape of the preset region may be a circular, a square, an elliptical,
a diamond, or the like, which is not limited in the present disclosure.
[0027] In an example, the number of the preset regions may be one or plural, which is not
limited in the present disclosure.
[0028] Specifically, when a user's finger presses on the touch display screen 120 of the
terminal device 100, different critical states formed on a contact surface are: 1)
a "skin - display screen" interface formed as the raised fingerprint ridge line contacts
the touch display screen 120; and 2) an "air - display screen" interface formed as
recessed fingerprint valleys contacts the touch display screen 120. Under the illumination
of the touch display screen 120, the reflectance of the "skin - display screen" interface
is small, and the reflectivity of the "air - display screen" interface is large, such
that a fingerprint image in bright and dark is formed. For example, as shown in FIG.
2, FIG. 2 is a schematic view of an interface according to embodiments of the present
disclosure. When the fingerprint is collected, the AP 110 controls the light-emitting
unit in the preset region to emit light, and brightness of the emitted light is called
as a first brightness. The AP 110 controls the light-emitting units in other region
to emit light, and brightness of the emitted light is called as a second brightness.
The first brightness is greater than the second brightness. Given that the first brightness
is equal to the second brightness, both of them are brightness of the touch display
when the touch display is normally displayed. Given that the brightness of the touch
display when the touch display is normally displayed is 50 lux, the reflectivity of
the "skin - display" interface is 30%, the reflectivity of the "air - display" interface
is 80%, then the brightness of the reflected light from the "skin - display" interface
is 15, and the brightness of reflected light from the "air - display screen" interface
is 40 lux. When the fingerprint is collected, given that the first brightness is equal
to the second brightness, the second brightness is brightness of the touch display
when the touch display is normally displayed. Given that the second brightness is
50 lux and the first brightness is 80 lux, the reflectivity of the "skin - display"
interface is still 30%, the reflectivity of the "air - display" interface is still
80%, then the brightness of the reflected light from the "skin - display" interface
is 24, and the brightness of reflected light from the "air - display screen" interface
is 64 lux. As it can be seen, the first brightness is brightness of the touch display
when the touch display is normally displayed, and the first brightness is equal to
50 lux, then the difference of brightness of two kinds of reflected light is 25. Given
that the brightness of the light illuminating the fingerprint of the user is increased
to 80 lux, the difference of brightness of two kind reflected light is 40. The more
the brightness of the light reflected from the two interfaces is different, the greater
the contrast is, which indicates that the more obvious the distinction between the
two interfaces is, and the clearer the collected fingerprint is. So, when the fingerprint
is collected, the brightness of light illuminating the fingerprint of the user is
increased, and the quality of the collected fingerprints can be improved.
[0029] The brightness of light emitted from the light-emitting unit in the other region
of the touch display screen 120 is brightness of the touch display screen when the
touch display screen is normally displayed.
[0030] The brightness of the touch display screen when the touch display screen 120 is normally
displayed refers to the display brightness for display set in the display setting
of the terminal device 100. When the user views videos, short messages, and news by
the terminal device 100, the display brightness of the touch display screen 120 is
the brightness when it is in the normal display (i.e., the display brightness for
display set in the display setting of the terminal device 100).
[0031] In one example, the light-emitting unit within the preset region of the touch display
screen 120 includes a set of green sub-pixels, a set of red sub-pixels, and a set
of blue sub-pixels. When the optical fingerprint sensor 130 collects a fingerprint,
all of the sub-pixels included in the set of green sub-pixels, the set of red sub-pixels,
and the set of blue sub-pixels emit green light.
[0032] Specifically, the touch display screen 120 is arranged in an "RGB" arrangement, and
one "RGB" is a pixel, and each pixel includes a green sub-pixel, a red sub-pixel,
and a blue sub-pixel. The green is a color with the least human skin, light emitted
from the green sub-pixel is brighter than light emitted from the red sub-pixels. In
addition, compared with the green sub-pixel, the red sub-pixel and the blue sub-pixel
have a larger area. When it is needed to increase brightness illuminating the fingerprint
of the user, the sub-pixels included in the set of green sub-pixels, the set of red
sub-pixels, and the set of blue sub-pixels are controlled to emit green lights. Compared
with a case where the green sub-pixels included in the set of green sub-pixels are
controlled to emit green light, a case where the red sub-pixels included in the set
of red sub-pixels are controlled to emit red light, and a case where the blue sub-pixels
included in the set of blue sub-pixels are controlled to emit blue light, all of sub-pixels
are just controlled to emit green lights in the present embodiment, which increases
the brightness illuminating the fingerprint of the user and then improve quality of
the fingerprint under a case the power consumption of the terminal device is kept
constant.
[0033] In an example, the light-emitting unit in the preset region of the touch display
screen 120 includes a set of pixels and a set of spare sub-pixels. When the optical
fingerprint sensor 130 collects a fingerprint, pixels in the set of pixels and the
set of spare sub-pixels emit light. The spare sub-pixels included in the set of spare
sub-pixels do not emit light when the optical fingerprint sensor does not collect
a fingerprint.
[0034] Specifically, the spare sub-pixels are arranged in the preset region. When it is
needed to increase brightness illuminating the fingerprint of the user, the pixels
in the set of pixels and the set of spare sub-pixels are controlled to emit light.
Compared with a case where the pixels in the set of pixels are only controlled to
emit light, the pixels in the set of pixels and the set of spare sub-pixels are controlled
to emit light, which increases the brightness illuminating the fingerprint of the
user and then improve quality of the fingerprint.
[0035] Further, the set of pixels includes a plurality of pixels, each of which includes
a green sub-pixel, a red sub-pixel, and a blue sub-pixel, and there exists a grid
between one sub- pixel and one sub-pixel. The set of spare sub-pixels includes a plurality
of spare sub-pixels, and each spare sub-pixel is disposed in the grid.
[0036] Specifically, as shown in FIG. 3, FIG. 3 is a schematic view of spare sub-pixels
according to embodiments of the present disclosure. The touch display screen 120 is
arranged in an "RGB" arrangement, and one "RGB" is a pixel, and each pixel includes
a green sub-pixel, a red sub-pixel, and a blue sub-pixel. There is a black gap between
one sub-pixel and one sub-pixel, which cannot emit light. These gaps are called as
the "grids". In this embodiment, the spare sub-pixels are disposed in the grids.
[0037] Further, each spare sub-pixel is a spare sub-pixel for a single color.
[0038] Further, the single color is a single green, a single red, or a single blue.
[0039] Specifically, when only the green sub-pixels are disposed in the grids, since the
green is a color with the least human skin and light emitted from the green sub-pixels
is brighter than light emitted from the red sub-pixels, in order to increase the brightness
of the light used to illuminate the user's fingerprint, only the spare green sub-pixels
are disposed in the grids.
[0040] Further, the plurality of spare sub-pixels includes a plurality of spare blue sub-pixels
and a plurality of spare red sub-pixels. A spare red sub-pixel is disposed in one
gird between a green sub-pixel and a red sub-pixel. A spare blue sub-pixel is disposed
in one grid between a green sub-pixel and a blue sub-pixel, or the spare blue sub-pixel
is disposed in one gird between a red sub-pixel and a blue sub-pixel.
[0041] Specifically, as shown in FIG. 4, for three emitting-light pixels of RGB display
screen, which are a green sub-pixel, a red sub-pixel, and a blue sub-pixel, the green
sub-pixel has the longest lifetime, followed by lifetime of the red sub-pixel and
then lifetime of the blue sub-pixel. In this embodiment, a spare red sub-pixel is
disposed in a gird between a green sub-pixel and a red sub-pixel, a spare blue sub-pixel
is disposed in a grid between a green sub-pixel and a blue sub-pixel, or the spare
blue sub-pixel is disposed in a gird between a red sub-pixel and a blue sub-pixel.
Thus, the spare red sub-pixel or the spare blue sub-pixel not only increases the brightness
for illuminating the fingerprint of the user when it is required to increase the brightness
for illuminating the fingerprint of the user, but also acts as a normal red sub-pixel
or blue sub-pixel when the normal red sub-pixel or blue sub-pixel fails, which extending
the life of the touch display screen.
[0042] For example, assuming that the target brightness is 50 lux, firstly, the AP 110 controls
the light-emitting unit in the preset region to emit 50 lux light, 50 lux light is
used to illuminate the fingerprint of the user. Then the optical fingerprint sensor
130 collects the user's fingerprint illuminated by 50 lux light. At this time, if
the sharpness of the user's fingerprint collected is less than the preset threshold,
it is determined that the user's finger is a dry finger. With the same brightness
of light, the collected fingerprint of the dry finger is less sharp than the collected
fingerprint of a normal finger. So, in order to improve the sharpness of the collected
fingerprint, the AP 110 controls the light-emitting unit in the preset region to emit
light higher than 50 lux light, and then the optical fingerprint sensor 130 collects
the user's fingerprint illuminated by light higher than 50 lux light.
[0043] FIG. 5 is a schematic flowchart of a method for collecting a fingerprint according
to embodiments of the present disclosure, which is applied to a terminal device. The
terminal includes an application processor (AP), an optical fingerprint sensor, and
a touch display screen. The touch display screen includes a preset region. The optical
fingerprint sensor is disposed below the preset region. The method includes actions/operations
in the following block.
[0044] At block S501, the terminal device controls the light-emitting unit in the preset
region of the touch display screen to emit light, wherein brightness of light emitted
from a light-emitting unit in the preset region of the touch display screen is greater
than brightness of light emitted from other light-emitting unit in other region of
the touch display screen.
[0045] At block S502, the terminal device acquires the fingerprint illuminated by light
emitted from the light-emitting unit in the preset region of the touch display screen.
[0046] In an example, the touch display screen is one of an LCD display, an OLED display,
and an LED display.
[0047] In an example, the maximum size of the preset region is the entire touch display
screen, and the minimum size is an area that enables the user to input a fingerprint
with a sufficient area, which is not limited in the present disclosure.
[0048] In an example, the preset region may be disposed at a lower left corner of the touch
display screen, a lower right corner of the touch display screen, or an upper right
corner of the touch display screen, which is not limited in the present disclosure.
[0049] In an example, the shape of the preset region may be a circular, a square, an elliptical,
a diamond, or the like, which is not limited in the present disclosure.
[0050] In an example, the number of the preset regions may be one or plural, which is not
limited in the present disclosure.
[0051] Specifically, when a user's finger presses on the touch display screen of the terminal
device, different critical states formed on a contact surface are: 1) a "skin - display
screen" interface formed as the raised fingerprint ridge line contacts the touch display
screen; and 2) a "air - display screen" interface formed as recessed fingerprint valleys
contacts the touch display screen. Under the illumination of the touch display screen,
the reflectance of the "skin-display screen" interface is small, and the reflectivity
of the "air - display screen" interface is large, such that a fingerprint image in
bright and dark is formed. For example, as shown in FIG. 2, FIG. 2 is a schematic
view of an interface according to embodiments of the present disclosure. When the
fingerprint is collected, the AP 110 controls the light-emitting unit in the preset
region to emit light, and brightness of the emitted light is called as a first brightness.
The AP 110 controls the light-emitting units in other region to emit light, and brightness
of the emitted light is called as a second brightness. The first brightness is greater
than the second brightness. Given that the first brightness is equal to the second
brightness, both of them are brightness of the touch display when the touch display
is normally displayed. Given that the brightness of the touch display when the touch
display is normally displayed is 50 lux, the reflectivity of the "skin - display"
interface is 30%, the reflectivity of the "air - display" interface is 80%, then the
brightness of the reflected light from the "skin - display" interface is 15, and the
brightness of reflected light from the "air - display screen" interface is 40 lux.
When the fingerprint is collected, given that the first brightness is equal to the
second brightness, the second brightness is brightness of the touch display when the
touch display is normally displayed. Given that the second brightness is 50 lux and
the first brightness is 80 lux, the reflectivity of the "skin - display" interface
is still 30%, the reflectivity of the "air - display" interface is still 80%, then
the brightness of the reflected light from the "skin - display" interface is 24, and
the brightness of reflected light from the "air - display screen" interface is 64
lux. As it can be seen, the first brightness is brightness of the touch display when
the touch display is normally displayed, and the first brightness is equal to 50 lux,
then the difference of brightness of two kind reflected light is 25. Given that the
brightness of the light illuminating the fingerprint of the user is increased to 80
lux, the difference of brightness of two kind reflected light is 40. The more the
brightness of the light reflected from the two interfaces is different, the greater
the contrast is, which indicates that the more obvious the distinction between the
two interfaces is, and the clearer the collected fingerprint is. So, when the fingerprint
is collected, the brightness of light illuminating the fingerprint of the user is
increased, and the quality of the collected fingerprints can be improved.
[0052] The brightness of light emitted from the light-emitting unit in the other region
of the touch display screen is brightness of the touch display screen when the touch
display screen is normally displayed.
[0053] The brightness of the touch display screen when the touch display screen is normally
displayed refers to the display brightness for display set in the display setting
of the terminal device. When the user views videos, short messages, and news by the
terminal device, the display brightness of the touch display screen is the brightness
when it is in the normal display (i.e., the display brightness for display set in
the display setting of the terminal device).
[0054] In an example, the terminal device controls the emitting-light unit in the preset
region of the touch display screen to emit light, which includes that he terminal
device controls the emitting-light unit in the preset region of the touch display
screen to emit light when the user's finger is determined to be a dry finger.
[0055] Specifically, when the user's finger is a dry finger, there are less grease and moisture
between the skin and the touch display screen. An "air - display screen" interface
formed as the raised fingerprint ridge line contacts the touch display screen, and
the reflectivity of a "skin-display screen" interface is large, such that the difference
between reflectivity of the two interfaces is reduced, and then the distinction between
the two interfaces is reduced. Thus, sharpness of the collected fingerprint is reduced,
and then the quality of the collected fingerprints can be decreased. For example,
supposed that the reflectivity of the "skin - display" interface of a normal finger
is 30%, the reflectivity of the "air - display" interface of the normal finger is
80%, and brightness for illuminating the fingerprint of the user is 50 lux, then the
brightness of the reflected light from the "skin - display" interface of the normal
finger is 15 , the brightness of reflected light from the "air - display screen" interface
of the normal finger is 40 lux, and the difference of brightness of two kinds of reflected
light for the normal finger is 25. Supposed that the reflectivity of the "skin - display"
interface of a dry finger is 40%, the reflectivity of the "air - display" interface
of the dry finger is 80%, and brightness for illuminating the fingerprint of the user
is 50 lux, then the brightness of the reflected light from the "skin - display" interface
of the dry finger is 20 , the brightness of reflected light from the "air - display
screen" interface of the dry finger is 40 lux, and the difference of brightness of
two kinds of reflected light for the dry finger is 20.
[0056] At this time, the brightness used for illuminating the fingerprint of the user is
increased from 50 lux to 80 lux. Given that the reflectivity of the "skin - display"
interface of the dry finger is still 30%, the reflectivity of the "air - display"
interface of the dry finger is still 80%, then the brightness of the reflected light
from the "skin - display" interface of the dry finger is 24, and the brightness of
reflected light from the "air - display screen" interface of the dry finger is 64
lux, and the difference of brightness of two kinds of reflected light for the dry
finger is 32.
[0057] It can be seen that in the case of the dry finger, the brightness used for illuminating
the fingerprint of the user is increased, so that the brightness of the reflected
light from the two interfaces is greatly different. The more the brightness of the
light reflected from the two interfaces is different, the more obvious the distinction
between the two interfaces is, and the clearer the collected fingerprint is. Thus,
the quality of the collected fingerprint is improved.
[0058] A finger having a certain amount of oil and moisture in the skin epidermis is a normal
finger, and a finger having less amount of oil and moisture in the skin epidermis
on the skin's epidermis compared with the normal finger is a dry finger.
[0059] In an example, the method further includes actions/operations in the following.
[0060] The terminal device controls the light-emitting unit in the preset region of the
touch display screen to emit light having a target brightness, wherein the target
brightness is brightness of the touch display screen when the touch display screen
is normally displayed and configured for illuminating the fingerprint of the user.
[0061] The terminal device acquires the fingerprint illuminated by the light having the
target brightness emitted from the light-emitting unit in the preset region of the
touch display screen.
[0062] The user's finger is determined as a dry finger when sharpness of the acquired fingerprint
under the light having the target brightness is less than a preset threshold.
[0063] Specifically, before increasing the brightness of the light for illuminating the
fingerprint of the user, it is first determined whether the finger of the user is
a dry finger, and if it is a dry finger, it is necessary to increase the brightness
of the light for illuminating the fingerprint of the user. Under the same brightness,
sharpness of the collected fingerprint of the normal finger by the optical fingerprint
sensor will be higher than sharpness of the collected fingerprint of the dry finger.
Therefore, with sharpness of the collected fingerprint, whether it is a dry finger
can be determined.
[0064] Further, the preset threshold is a sharpness of the collected fingerprint of the
normal finger under the illumination of the target brightness.
[0065] In an example, the light-emitting unit within the preset region of the touch display
screen includes a set of green sub-pixels, a set of red sub-pixels, and a set of blue
sub-pixels. The terminal device controls the light-emitting unit in the preset region
of the touch display screen to emit light, which specifically includes that the terminal
device controls sub-pixels in the set of green sub-pixels, the set of red sub-pixels,
and the set of blue sub-pixels emit green light.
[0066] Specifically, the touch display screen is arranged in an "RGB" arrangement, and one
"RGB" is a pixel, and each pixel includes a green sub-pixel, a red sub-pixel, and
a blue sub-pixel. The green is a color with the least human skin, light emitted from
the green sub-pixel is brighter than light emitted from the red sub-pixels. In addition,
compared with the green sub-pixel, the red sub-pixel and the blue sub-pixel have a
larger area. When it is needed to increase brightness illuminating the fingerprint
of the user, the sub-pixels included in the set of green sub-pixels, the set of red
sub-pixels, and the set of blue sub-pixels are controlled to emit green lights. Compared
with a case where the green sub-pixels included in the set of green sub-pixels are
controlled to emit green light, a case where the red sub-pixels included in the set
of red sub-pixels are controlled to emit red light, and a case where the blue sub-pixels
included in the set of blue sub-pixels are controlled to emit blue light, all of sub-pixels
are just controlled to emit green lights in the present embodiment, which increases
the brightness illuminating the fingerprint of the user and then improve quality of
the fingerprint under a case the power consumption of the terminal device is kept
constant.
[0067] In an example, the light-emitting unit in the preset region of the touch display
screen includes a set of pixels and a set of spare sub-pixels. The terminal device
controls the light-emitting unit in the preset region of the touch display screen
to emit light, which specifically includes in the following.
[0068] The terminal device controls pixels in the set of pixels and the set of spare sub-pixels
emit light, wherein the spare sub-pixels included in the set of spare sub-pixels do
not emit light when the fingerprint is not collected.
[0069] In an example, the set of pixels includes a plurality of pixels, each of which includes
a green sub-pixel, a red sub-pixel, and a blue sub-pixel, and there exists a grid
between one sub-pixel and one sub-pixel. The set of spare sub-pixels includes a plurality
of spare sub-pixels, and each spare sub-pixel is disposed in the grid.
[0070] Specifically, the spare sub-pixels are arranged in the preset region. When it is
needed to increase brightness illuminating the fingerprint of the user, the pixels
in the set of pixels and the set of spare sub-pixels are controlled to emit light.
Compared with a case where the pixels in the set of pixels are only controlled to
emit light, the pixels in the set of pixels and the set of spare sub-pixels are controlled
to emit light, which increases the brightness illuminating the fingerprint of the
user and then improve quality of the fingerprint.
[0071] Further, the set of pixels includes a plurality of pixels, each of which includes
a green sub-pixel, a red sub-pixel, and a blue sub-pixel, and there exists a grid
between one sub- pixel and one sub-pixel. The set of spare sub-pixels includes a plurality
of spare sub-pixels, and each spare sub-pixel is disposed in the grid.
[0072] Specifically, as shown in FIG. 3, the touch display screen is arranged in an "RGB"
arrangement, and one "RGB" is a pixel, and each pixel includes a green sub-pixel,
a red sub-pixel, and a blue sub-pixel. There is a black gap between one sub-pixel
and one sub-pixel, which cannot emit light. These gaps are called as the "grids".
In this embodiment, the spare sub-pixels are disposed in the grids.
[0073] Further, each spare sub-pixel is a spare sub-pixel for a single color.
[0074] Further, the single color is a single green, a single red, or a single blue.
[0075] Specifically, when only the green sub-pixels are disposed in the grids, since the
green is a color with the least human skin and light emitted from the green sub-pixels
is brighter than light emitted from the red sub-pixels, in order to increase the brightness
of the light used to illuminate the user's fingerprint, only the spare green sub-pixels
are disposed in the grids.
[0076] Further, the plurality of spare sub-pixels includes a plurality of spare blue sub-pixels
and a plurality of spare red sub-pixels. A spare red sub-pixel is disposed in one
gird between a green sub-pixel and a red sub-pixel. A spare blue sub-pixel is disposed
in one grid between a green sub-pixel and a blue sub-pixel, or the spare blue sub-pixel
is disposed in one gird between a red sub-pixel and a blue sub-pixel.
[0077] Specifically, as shown in FIG. 4, for three emitting-light pixels of RGB display
screen, which are a green sub-pixel, a red sub-pixel, and a blue sub-pixel, the green
sub-pixel has the longest lifetime, followed by lifetime of the red sub-pixel and
then lifetime of the blue sub-pixel. In this embodiment, a spare red sub-pixel is
disposed in a gird between a green sub-pixel and a red sub-pixel, a spare blue sub-pixel
is disposed in a grid between a green sub-pixel and a blue sub-pixel, or the spare
blue sub-pixel is disposed in a gird between a red sub-pixel and a blue sub-pixel.
Thus, the spare red sub-pixel or the spare blue sub-pixel not only increases the brightness
for illuminating the fingerprint of the user when it is required to increase the brightness
for illuminating the fingerprint of the user, but also acts as a normal red sub-pixel
or blue sub-pixel when the normal red sub-pixel or blue sub-pixel fails, which extending
the life of the touch display screen.
[0078] For example, assuming that the target brightness is 50 lux, firstly, the AP 110 controls
the light-emitting unit in the preset region to emit 50 lux light, 50 lux light is
used to illuminate the fingerprint of the user. Then the optical fingerprint sensor
130 collects the user's fingerprint illuminated by 50 lux light. At this time, if
the sharpness of the user's fingerprint collected is less than the preset threshold,
it is determined that the user's finger is a dry finger. With the same brightness
of light, the collected fingerprint of the dry finger is less sharp than the collected
fingerprint of a normal finger. So, in order to improve the sharpness of the collected
fingerprint, the AP 110 controls the light-emitting unit in the preset region to emit
light higher than 50 lux light, and then the optical fingerprint sensor 130 collects
the user's fingerprint illuminated by light higher than 50 lux light.
[0079] FIG. 6 is a schematic structural diagram of another terminal device 600 according
to embodiments of the present disclosure. The terminal device includes an application
processor (AP), an optical fingerprint sensor, a touch display screen, at least one
memory, and one or more programs. The touch display screen includes a preset region.
The optical fingerprint sensor is disposed below the preset region.
[0080] The one or more programs are stored in the memory and are configured to be executed
by the AP, and the program includes instructions for performing actions/operations
in the following.
[0081] Controlling the light-emitting unit in the preset region of the touch display screen
to emit light, wherein brightness of light emitted from a light-emitting unit in the
preset region of the touch display screen is greater than brightness of light emitted
from other light-emitting unit in other region of the touch display screen.
[0082] Acquiring the fingerprint illuminated by light emitted from the light-emitting unit
in the preset region of the touch display screen.
[0083] In an example, in an aspect of the controlling a light-emitting unit in the preset
region of the touch display screen to emit light, the program specifically includes
instructions for performing actions/operations in the following.
[0084] Controlling a light-emitting unit in the preset region of the touch display screen
to emit light when a user's finger is determined as a dry finger.
[0085] In an example, the light-emitting unit within the preset region of the touch display
screen includes a set of green sub-pixels, a set of red sub-pixels, and a set of blue
sub-pixels. In an aspect of the controlling a light-emitting unit in the preset region
of the touch display screen to emit light, the program specifically includes instructions
for performing actions/operations in the following.
[0086] Controlling sub-pixels in the set of green sub-pixels, the set of red sub-pixels,
and the set of blue sub-pixels emit green light.
[0087] In an example, the light-emitting unit in the preset region of the touch display
screen includes a set of pixels and a set of spare sub-pixels. In an aspect of the
controlling a light-emitting unit in the preset region of the touch display screen
to emit light, the program specifically includes instructions for performing actions/operations
in the following.
[0088] Controlling pixels in the set of pixels and the set of spare sub-pixels emit light.
[0089] The spare sub-pixels included in the set of spare sub-pixels do not emit light when
the fingerprint is not collected.
[0090] In an example, the set of pixels includes a plurality of pixels, each of which includes
a green sub-pixel, a red sub-pixel, and a blue sub-pixel, and there exists a grid
between one sub-pixel and one sub-pixel. The set of spare sub-pixels includes a plurality
of spare sub-pixels, and each spare sub-pixel is disposed in the grid.
[0091] In an example, each spare sub-pixel is a spare sub-pixel for a single color.
[0092] In an example, the single color is a single green, a single red, or a single blue.
[0093] In an example, the plurality of spare sub-pixels includes a plurality of spare blue
sub-pixels and a plurality of spare red sub-pixels. A spare red sub-pixel is disposed
in one gird between a green sub-pixel and a red sub-pixel. A spare blue sub-pixel
is disposed in one grid between a green sub-pixel and a blue sub-pixel, or the spare
blue sub-pixel is disposed in one gird between a red sub-pixel and a blue sub-pixel.
[0094] In an example, the program further includes instructions for performing actions/operations
in the following.
[0095] Controlling the light-emitting unit in the preset region of the touch display screen
to emit light having a target brightness, wherein the target brightness is brightness
of the touch display screen when the touch display screen is normally displayed and
configured for illuminating the fingerprint of the user.
[0096] Acquiring the fingerprint illuminated by the light having the target brightness emitted
from the light-emitting unit in the preset region of the touch display screen.
[0097] Determining the user's finger as a dry finger when sharpness of the acquired fingerprint
under the light having the target brightness is less than a preset threshold.
[0098] As it can been, in the embodiments provided by the present disclosure, when the fingerprint
is collected, the brightness illuminating the fingerprint of the user is increased,
and then the quality of the collected fingerprint is improved.
[0099] FIG. 7 is a schematic structural diagram of an apparatus 700 for collecting a fingerprint
according to embodiments of the present disclosure. The apparatus is applied to a
terminal device including an optical fingerprint sensor and a touch display screen,
wherein the touch display screen includes a preset region, the optical fingerprint
sensor is disposed below the preset region. The apparatus includes a processing unit
701, a communication unit 702, and storage unit 703.
[0100] The processing unit 701 is configured to control the light-emitting unit in the preset
region of the touch display screen to emit light, wherein brightness of light emitted
from a light-emitting unit in the preset region of the touch display screen is greater
than brightness of light emitted from other light-emitting unit in other region of
the touch display screen.
[0101] The processing unit 701 may be a processor or controller (e.g., a central processing
unit (CPU), a general purpose processor, a digital signal processor (DSP), an application
specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA) or other
programmable logic devices, transistor logic devices, hardware components, or any
combination thereof, which may be implemented or executed in conjunction with various
exemplary logical blocks, modules, and circuits in the present disclosure. The processor
may also be a combination of computing functions, for example, including a combination
of one or more microprocessor, a combination of a DSP and a microprocessor, and the
like. The communication unit 702 can be a transceiver, a transceiver circuit, a radio
frequency chip, a communication interface, etc., and the storage unit 703 can be a
memory.
[0102] When the processing unit 701 is a processor, the communication unit 702 is a communication
interface, and the storage unit 703 is a memory, the apparatus according to the embodiment
of the present disclosure may be the terminal device as shown in FIG. 6.
[0103] Another mobile terminal is further provided in an embodiment of the present disclosure.
As shown in FIG. 8, for the convenience of description, only the parts related to
the embodiments of the present disclosure are shown. If the specific technical details
are not disclosed, please refer to the method part of the embodiment of the present
disclosure. The mobile terminal may be any terminal device including a mobile phone,
a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), an
in-vehicle computer, and the like. The mobile terminal is used as a mobile phone as
an example:
[0104] FIG. 8 is a block diagram showing a partial structure of a mobile phone related to
a mobile terminal provided by an embodiment of the present disclosure. As shown in
FIG. 8, the mobile phone includes a radio frequency (RF) circuit 910, a memory 920,
an input unit 930, a display unit 940, a sensor 950, an audio circuit 960, a wireless
fidelity (Wi-Fi) module 970, a processor 980, and a power supply 990. It will be understood
by those skilled in the art that the structure of the mobile phone as shown in FIG.
8 does not constitute a limitation to the mobile phone, and may include more or less
components than those illustrated, or some components may be combined, or different
component arrangements.
[0105] The components of the mobile phone will be described in detail with reference to
FIG. 8 in the following.
[0106] The RF circuit 910 can be used for receiving and emitting information. Usually, the
RF circuit includes, but not limited to, an antenna, at least one amplifier, a transceiver,
a coupler, a Low Noise Amplifier (LNA), a duplexer and so on. In addition, the RF
circuit may further communicate with other devices via wireless communication and
a network. The above wireless communication may use any communication standard or
protocol, including but not limited to Global System of Mobile communication (GSM),
General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division),
Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term
Evolution (LTE), E-mail, Short Messaging Service (SMS), and the like.
[0107] The memory 920 may be configured to store software programs and modules, and the
processor 980 executes various function applications and data processing of the mobile
phone by running the software programs and the modules stored in the memory920. The
memory 920 may mainly include a program storage region and a data storage region,
wherein the program storage region may store an operation system, application programs
for at least one function (for example, an audio playing function, an image playing
function, etc.), and the data storage region may store data (for example, audio data,
telephone directory, etc.) created according to use of the mobile phone. In addition,
the memory 920 may include a high-speed RAM, and may further include a non-volatile
memory such as at least one of a disk storage device, a flash device, or other non-volatile
solid storage devices.
[0108] The input unit 930 may be configured to receive input digital or character information
and generate key signal input associated with user setting and functional control
of the mobile phone. Specifically, the input unit 930 can include an optical fingerprint
sensor 931 and other input devices 932. The optical fingerprint sensor 931 can collect
data of a user's fingerprint. In addition to the optical fingerprint sensor 931, the
input unit 930 may also include other input devices 932. Specifically, the other input
devices 932 may include, but not limited to, one or more of a physical keyboard, a
functional key (such as a volume control key and a switch key), a track ball, a mouse,
an operating rod, etc.
[0109] The display unit 940 can be used to display information input by the user or information
provided to the user as well as various menus of the mobile phone. The display unit
940 may include a display screen 941, which is alternatively configured to be a Liquid
Crystal Display (LCD), an Organic Light-Emitting Diode (OLED) and the like.
[0110] The mobile phone may also include at least one type of sensor 950, such as a light
sensor, motion sensor, and other sensors. Specifically, the light sensor may include
an ambient light sensor (also called light sensor) and a proximity sensor, wherein
the ambient light sensor may adjust the brightness of the display screen 941 according
to the brightness of the ambient light, and the proximity sensor may turn off the
display screen 941 and/or backlight when the mobile phone is moved to the ear. As
a motion sensor, the accelerometer sensor can detect the magnitude of acceleration
in all directions (usually three axes). When it is stationary, it can detect the magnitude
and direction of gravity, which can be used to identify the gesture of the mobile
phone (such as horizontal and vertical screen switching, related games, magnetometer
attitude calibration), vibration recognition related functions (such as pedometer,
tapping), etc. Other sensors such as gyroscopes, barometers, hygrometers, thermometers,
infrared sensors can be configured on the mobile phone, which are no longer described
herein.
[0111] An audio circuit 960, a speaker 961 and a microphone 962 may provide an audio interface
between the user and the mobile phone. The audio circuit 960 can convert the received
audio data to the electrical data and then emit to the speaker 961. The speaker 961
then converts to the sound signal. On the other hand, the microphone 962 converts
the collected sound signal into an electrical signal. The audio circuit 960 receives
the electrical signal and then convert it into audio data. The processor 980 processes
the audio data and then transmits another mobile phone via the RF circuit 910, or
transmits to the memory 920 for further processing.
[0112] Wi-Fi belongs to a short-range wireless transmission technology. The mobile phone
may assist the user to receive and send e-mails, webpage browsing, access to streaming
media and the like by means of the Wi-Fi module 970, which provides a wireless wideband
internet access for the user. Although the Wi-Fi module 970 is illustrated in FIG.
8, it may be understood that, it may be optional components of the mobile phone and
may totally be omitted without changing the essence of the present disclosure as claimed.
[0113] The processor 980 is a control center of the mobile phone, which is connected to
all parts of the mobile phone by utilizing various interfaces and lines and execute
various functions and processing data of the mobile phone by running or executing
the software program and/or the module stored in the memory and calling data stored
in the memory 920. Thus, it wholly monitors the mobile phone. Optionally, the processor
980 may include one or more processing units. The processor 980 may be integrated
with an application processor and a modulation-demodulation processor. The application
processor mainly processes an operation system, a user interface, an application program
and the like, and the modulation-demodulation processor mainly processes wireless
communication. It will be appreciated that the above described modulation-demodulation
processor may also not be integrated into the processor 980.
[0114] The mobile phone also includes a power supply 990 (such as a battery) that supplies
power to the various components. Preferably, the power supply can be logically coupled
to the processor 980 through a power management system to manage functions such as
charging, discharging, and power management through the power management system.
[0115] Although not shown, the mobile phone may further include a camera, a Bluetooth module,
and the like, which are not described in detail herein again.
[0116] In the foregoing embodiments shown in FIG. 5, each actions/operation of the method
can be implemented based on the structure of the mobile phone.
[0117] In the foregoing embodiments shown in FIG. 7, each function unit can be implemented
based on the structure of the mobile phone.
[0118] A computer storage medium is further provided in embodiments of the present disclosure.
The computer storage medium stores computer programs for electronic data exchange.
The computer programs cause a computer to perform some or all of the actions of any
of the methods for collecting a fingerprint described in the foregoing embodiments.
[0119] A computer program product is provided in embodiments of the present disclosure.
The computer program product includes a non-transitory computer readable storage medium
storing a computer program. The computer programs cause a computer to perform some
or all of the actions of any of the methods described in the foregoing embodiments.
[0120] It should be noted that, for the foregoing method embodiments, for the sake of brevity,
they are all described as a series of action combinations, but those skilled in the
art should understand that the present disclosure is not limited by the described
action sequence. Because certain steps may be performed in other sequences or concurrently
in accordance with the present disclosure. In the following, those skilled in the
art should also understand that the embodiments described in the specification are
all preferred embodiments, and the actions and modules involved are not necessarily
required by the present disclosure.
[0121] In the above embodiments, the descriptions of the various embodiments are all focused
on, and the parts that are not detailed in a certain embodiment can be referred to
the related descriptions of other embodiments.
[0122] In several embodiments provided herein, it should be understood that the disclosed
apparatus may be implemented in other ways. For example, the device embodiments described
above are merely illustrative. For example, the division of the above units is only
a logical function division. In actual implementation, there may be another division
manner. For example, multiple units or components may be combined or integrated to
another system, or some features can be ignored or not executed. In addition, the
mutual coupling or direct coupling or communication connection shown or discussed
may be an indirect coupling or communication connection through some interface, device
or unit, and may be electrical or otherwise.
[0123] The units described above as separate components may or may not be physically separated,
and the components illustrated as units may or may not be physical units, which may
be located in one place, or may be distributed to multiple network units. Some or
all of the units may be selected according to actual needs to achieve the purpose
of the solution of the embodiment.
[0124] In addition, each functional unit in each embodiment of the present disclosure may
be integrated into one processing unit, or each unit may exist physically separately.
Alternatively, two or more units may also be integrated into one unit. The above integrated
unit can be implemented in the form of hardware or in the form of a software functional
unit.
[0125] The above-described integrated unit can be stored in a computer readable memory if
it is implemented in the form of a software functional unit and sold or used as a
standalone product. Based on such understanding, the technical solution of the present
disclosure, in essence or the contribution to the prior art, or all or part of the
technical solution may be embodied in the form of a software product. The software
product is stored in a memory, which includes a number of instructions causing a computer
device (which may be a personal computer, server or network device, etc.) to perform
all or part of the actions of the above-described methods of various embodiments of
the present disclosure. The foregoing memory includes a U disk, a Read-Only Memory
(ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an
optical disk, and the like, which can store program codes.
[0126] One of ordinary skill in the art can understand that all or part of the various methods
of the above embodiments can be completed by related hardware instructed by a program.
The program can be stored in a computer readable memory, and the memory can include
a flash drive, read-only memory (ROM), random access memory (RAM), disk or CD.
[0127] The embodiments of the present disclosure have been described in detail above, and
the principles and implementations of the present disclosure are described in the
specific examples. The description of the above embodiments is only used to help understand
the method of the present disclosure and its core ideas. For a person skilled in the
art, there will have a change in the specific embodiments and the scope of present
disclosure according to the idea of the present disclosure. In summary, the content
of the present specification should not be construed as limiting the present disclosure.
1. A terminal device, comprising an optical fingerprint sensor and a touch display screen,
wherein the touch display screen comprises a preset region, and the optical fingerprint
sensor is disposed below the preset region, wherein brightness of light emitted from
a light-emitting unit in the preset region of the touch display screen is greater
than brightness of light emitted from other light-emitting unit in other region of
the touch display screen, when the optical fingerprint sensor collects a fingerprint.
2. The terminal device of claim 1, wherein the light-emitting unit in the preset region
of the touch display screen comprises a set of green sub-pixels, a set of red sub-pixels,
and a set of blue sub-pixels; and sub-pixels in the set of green sub-pixels, the set
of red sub-pixels, and the set of blue sub-pixels emit green light when the optical
fingerprint sensor collects the fingerprint.
3. The terminal device of claim 1, wherein the light-emitting unit in the preset region
of the touch display screen comprises a set of pixels and a set of spare sub-pixels;
pixels in the set of pixels and the set of spare sub-pixels emit light when the optical
fingerprint sensor collects the fingerprint;
spare sub-pixels in the set of spare sub-pixels do not emit light when the optical
fingerprint sensor does not collect the fingerprint.
4. The terminal device of claim 3, wherein the set of pixels comprises a plurality of
pixels, wherein each pixel comprises a green sub-pixel, a red sub-pixel, and a blue
sub-pixel, a grid is between one sub-pixel and one sub-pixel; and the set of spare
sub-pixels comprises a plurality of spare sub-pixels, spare sub-pixels are disposed
in the grid.
5. The terminal device of claim 3 or 4, wherein each spare sub-pixel is a spare sub-pixel
with a single color.
6. The terminal device of claim 5, wherein the single color is a single green, a single
red, or a single blue.
7. The terminal device of claim 4, wherein the plurality of spare sub-pixels comprises
a plurality of spare blue sub-pixels and a plurality of spare red sub-pixels; wherein
each of the spare red sub-pixels is disposed in one grid between a green sub-pixel
and a red sub-pixel; each of the spare blue sub-pixels is disposed in one grid between
a green sub-pixel and a blue sub-pixel, or each of the spare blue sub-pixel is disposed
in one grid between a green sub-pixel and a red sub-pixel.
8. A method for collecting a fingerprint, applied to a terminal device comprising an
application processor, an optical fingerprint sensor, and a touch display screen,
the touch display screen comprising a preset region, wherein the optical fingerprint
sensor is disposed below the preset region, comprising:
controlling a light-emitting unit in the preset region of the touch display screen
to emit light, wherein brightness of the light emitted from the light-emitting unit
in the preset region of the touch display screen is greater than brightness of light
emitted from other light-emitting unit in other region of the touch display screen;
and
acquiring the fingerprint illuminated by the light emitted from the light-emitting
unit in the preset region of the touch display screen.
9. The method of claim 8, wherein the controlling a light-emitting unit in the preset
region of the touch display screen to emit light comprises:
controlling the light-emitting unit in the preset region of the touch display screen
to emit light when a user's finger is determined as a dry finger.
10. The method of claim 8 or 9, wherein the light-emitting unit in the preset region of
the touch display screen comprises a set of green sub-pixels, a set of red sub-pixels
and a set of blue sub-pixels; and
the controlling the light-emitting unit in the preset region of the touch display
screen to emit light comprises:
controlling sub-pixels in the set of green sub-pixels, the set of red sub-pixels,
and the set of blue sub-pixels emit green light.
11. The method of claim 8 or 9, wherein the light-emitting unit in the preset region of
the touch display screen comprises a set of pixels and a set of spare sub-pixels;
and
the controlling the light-emitting unit in the preset region of the touch display
screen to emit light comprises:
controlling pixels in the set of pixels and the set of spare sub-pixels emit light,
wherein the spare sub-pixels in the set of spare sub-pixels do not emit light when
the fingerprint is not collected.
12. The method of claim 11, wherein the set of pixels comprises a plurality of pixels,
wherein each pixel comprises a green sub-pixel, a red sub-pixel, and a blue sub-pixel,
a grid is between one sub-pixel and one sub-pixel; and the set of spare sub-pixels
comprises a plurality of spare sub-pixels, spare sub-pixels are disposed in the grid.
13. The method of claim 11 or 12, wherein each spare sub-pixel is a spare sub-pixel with
a single color.
14. The method of claim 13, wherein the single color is a single green, a single red,
or a single blue.
15. The method of claim 12, wherein the plurality of spare sub-pixels comprises a plurality
of spare blue sub-pixels and a plurality of spare red sub-pixels; wherein each of
the spare red sub-pixels is disposed in one grid between a green sub-pixel and a red
sub-pixel; each of the spare blue sub-pixels is disposed in one grid between a green
sub-pixel and a blue sub-pixel, or each of the spare blue sub-pixel is disposed in
one grid between a green sub-pixel and a red sub-pixel.
16. The method of any one of claims 8-15, further comprising:
controlling the light-emitting unit in the preset region of the touch display screen
to emit light having a target brightness, wherein the target brightness is brightness
of the touch display screen when the touch display screen is normally displayed and
configured for illuminating the fingerprint of the user;
acquiring the fingerprint illuminated by the light having the target brightness emitted
from the light-emitting unit in the preset region of the touch display screen; and
determining the user's finger as a dry finger when sharpness of the acquired fingerprint
under the light with the target brightness is less than a preset threshold.
17. An apparatus for collecting a fingerprint, applied to a terminal device an optical
fingerprint sensor and a touch display screen, wherein the touch display screen comprises
a preset region, and the optical fingerprint sensor is disposed below the preset region,
and the apparatus comprises a processor,
the processor is configured for controlling a light-emitting unit in the preset region
of the touch display screen to emit light, wherein brightness of the light emitted
from the light-emitting unit in the preset region of the touch display screen is greater
than brightness of light emitted from other light-emitting unit in other region of
the touch display screen; and acquiring the fingerprint illuminated by the light emitted
from the light-emitting unit in the preset region of the touch display screen.
18. A terminal device, comprising an application processor (AP), an optical fingerprint
sensor , a touch display screen, a memory, and one or more programs, wherein the touch
display screen comprises a preset region, the optical fingerprint sensor is disposed
below the preset region;
the one or more programs are stored in the memory and configured to be executed by
the AP, the one or more programs comprises instructions for performing a method of
any of claims 8-16.
19. A computer-readable storage medium, storing a computer program for the electronic
data interchange, wherein the computer program causes a computer to perform a method
of any of claims 8-16.
20. A computer program product, comprising a non-transitory computer readable storage
medium storing a computer program, the computer program being operative to cause a
computer to perform a method of any of claims 8-16.